SOCS040A - MARCH 1994 - REVISED NOVEMBER 1994
The TMC57253 is a monolithic CMOS integrated circuit designed to drive image-area gates (IAG1, IAG2), antiblooming gate (ABG), storage-area gate (SAG), and serial-register gate (SRG) of the Texas Instruments TC255 CCD image sensor. The TMC57253 interfaces the CCD image sensor to the TI TMC57751 ASIC or user-defined timing generator; it receives TTL input signals from the timing generator and outputs level-shifted signals to the image sensor.
The ABOUT output follows the ABIN and ABMIN inputs and switches between VABL, VAB, and VABM. The IA1OUT and IA2OUT outputs follow the IA1IN and IA2IN inputs, respectively, and switch between GND and VIA. The SAOUT output follows the SAIN input and switches GND and VS. The SROUT output follows the SRIN and SRMIN inputs and switches between GND, VSM and VS.
The TMC57253 is available in a HSOP-B surface-mount package and is characterized for operation from -20°C to 45°C.
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C, Method 3015; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments.
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